Derrick.



' A. FOREST.

' DERRICK.

APPLICATION FILED DEC. 16, 1908. 948,851. Patentd Feb. 8, 1910.

2 QHEETS-SHEET 1,

' W1 TNESSES INVENTOR.

. Patented. Feb; 8, 1910.

2 SHEETS-SHEET 2.

ESSES:

WITN

INVENTOR. azww aZ ATTORNEK rinrTnn STATES raTnnT orrror.

ALBERT FOREST, 0F DEER RIVER, MINNESOTA, ASSIGNOR OF ONE-FOURTH 'IO NA-TIONAL IRON COMPANY, OF DULUTH,

MINNESOTA, A CORPORATION OF MINNE- SOTA, AND ONE-HALF TO JOSEPH P.VINCENT, 0F DULUTH, MINNESOTA.

DERRICK.

To all whom it may concern:

Be it known that I, ALBERT FOREST, a citizen of the United States,residing at Deer River, in the county of Itasca and State of Minnesota,have invented certain new and useful Improvements in Derricks; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains .to make and use the same.

My invention relates to log derricks and has for its object theprovision of a cheap, effective and convenient derrick of improvedconstruction.

It consists of the constructions, combinations and arrangements of partshereinafter described and claimed.

In the accompanying drawings, Figure 1 is a perspective view of thepreferred form of my said invention, omitting the hereinafter referredto sheave for the drive belt of the hoisting drum. Fig. 2, is anenlarged rear elevation of said preferred form of my invention, partlybroken away. Fig. 3, is a detail side elevation of a brake deviceforming part of my said invention. Fig. 4, is an enlarged side elevationof a drum rotating device forming part of my said invention. Fig. 5, isan enlarged front elevation of a latch and an enlarged fragmentary frontelevation of a frame, and a fragmentary front elevation of a mast, allembodied in my said invention.

In the drawings 1, is a fixed, forwardly inclined surbase, mounted upona base of any suitable construction as 2, which base 2 is preferablymovable along a roadway from one station when the derrick is to be usedto another such station. Upon said base is mounted a pivot plate orsocket, 3, whereon is pivotally mounted a horizontally oscillatableclevis A mast 5 is pivotally connected to and supported by said clevis.A mast brace 6, is mounted upon said base and preferably extendstransversely thereof in rear of said mast, and said mast is preferablysupported against said brace by any suitable means, as by a releasablelatch 7, which in operation is secured at its ends to the transverselyextending portion of said brace, and passes in front of said mast,pivotally supported on said mast by any suitable means is a forwardlydirected jib or Specification of Letters Patent.

Application filed December 16, 1908.

Patented Feb. 8, 1910. Serial No. 467,788.

boom 8, upon the forward end of which is supported a sheave 9 adapted toengage a hoisting cable 10. Upon the upper end of said mast is mounted acap 11, to which are secured suitable sheaves as 12, 13 and 14:, adaptedto engage guy lines 1%, 13 and 14*, respectively. The guy line 12 issecured at one end to a drum 12 mounted upon said mast brace, and afterpassing through one of the sheaves at said cap, its free end is adaptedto be secured to a wayside tree or stump, not shown, or to any suitableanchorage. Said line M is secured at one end to a drum li mounted onsaid brace, and after passing through one of the sheaves at said cap, isadapted in operation to be secured at its opposite end to a waysidestump, or other suitable anchorage. Said line 18 is secured at one endto a drum l3 mounted upon said brace and after passing through one ofthe sheaves at said cap is adapted to be secured to a stake (not shown)or any suitable anchorage in rear of said base, or to the rearward endof said base. Upon said surbase is pivotally mounted an upwardlydirected windlass frame 16, which is inclined forwardly and rests uponsaid surbase. Upon said windlass frame is mounted a rotatable shaft 17,upon which is mounted a double windlass of greater diameter at one endas at 18 than at the other end, as at 19, said windlass being providedwith an annular partition flange 20 between the ends of differentdiameters. Said hoisting cable is secured to said flange and inoperation is wound one or more times around one or the other end of saidwindlass and thence passes upwardly through an elongated slot or aperture 21 formed in a rearwardly directed shifting lever 21 which ispivotally supported at its forward end upon a suitable support, as uponsaid inast-brace. Said hoisting cable thence passes upward and over asuitable sheave 22 mounted upon said mast and thence forwardly and oversaid sheave 9. A drive belt wheel .43 of any suitable construction isloosely mounted upon said shaft and is adapted to be engaged by a clutch2-1 slidably keyed to said shaft, which clutch is preferably operated bya train of levers 2%, 2 t 24: and 24 Said belt wheel is engaged by anendless drive belt 25 of any suitable construction, which belt alsoengages an idler sheave of any suitable construction A secured to anysuitable fixed anchorage in rear of said drive wheel, as to a stake orstump in the roadway. Secured to said belt, between said drive wheel andsaid idler, is a ring, or equivalent device 25*, to which a team ofhorses may be secured. Upon said shaft is keyed a brake wheel 26 adaptedto be engaged by a band brake 26 which is secured at its end to a brakelever 26 which is pivotally secured to a stanchion 26" mounted upon saidwindlass frame.- Keyed to said shaft are two ratchet wheels 27 and 28,having oppositely directed teeth. Forwardly of said ratchet wheel. 27,is positioned a pawl 27 adapted in operation to engage said ratchetwheel 27. R-earwardly of said ratchet wheel :28 is positioned a pawl 28adapted in operation to engage said ratchet wheel 28. Said pawls areenlarged or weighted at their lower ends and are pivotally connectedintermediate of their ends to the opposite ends of the body portion 29of a rock arm which is pivotally mounted intermediate of its ends uponsaid windlass frame. Said rock arm is provided with a lever portion 29*,extending at an angle to the body portion thereof, which lever portionis pivotally connected at one end to one end of a connecting bar 30,which is pivotally connected at its opposite end to an operating lever31 pivotally mounted upon said windlass frame. \Vhen said lever is innormal position at center, said pawls are both clear of said ratchetwheels, but when said lever is thrust forward or drawn back ward, one orthe other of said pawls will engage its ratchet wheel, and rotate saidshaft in one direction or the other as the case may be. Ratchet wheels12, 18 and 14 and pawls 12 13 and 1 1 are provided for preventing thecounter rotation of said drums 12 13 and la as will be readilyunderstood by those skilled in the art; and said drmns may be rotated byhand cranks 32 engaged by the shafts upon which said drums are keyed.Mounted upon a suitable support, as upon a bracket 15 secured to saidmast, is a drum 33, to which is secured one end of a guy line 33, whichpasses thence over a pulley 33 mounted on said mast and thence forwardlyto the forward end of said boom, to which it is secured. The said drum33, may be rotated by a crank similar to said cranks 32, and its counterrotation may be prevented by a ratchet wheel and pawl similar to thewheel 12 and pawl 12.

In operation, the base is fixed in position on the roadway, by anysuitable means, as by stakes or pins, A. The idler pulley is thencarried out and secured to its anchorage. The team is then connected tosaid ring and traverses a path between said idler and said base, goingback and forth if desired without stop. When going in one direction theteam will (provided said clutch is engaged with said drive wheel) rotatesaid windlass to wind up the hoisting cable, and when going in theopposite direction (said clutch being then thrown out) will rotate thedrive wheel idly in the opposite directionor, if at such time the clutchbe thrown into engagement with the drive wheel,will operate the windlassto pay out the hoisting cable, said shift lever may be operated to shiftthe hoisting cable to the larger or smaller end of the windlass so as toincrease either the speed or the power thereof with relation to thehoisting cable. The direction of the lead of the hoisting cable alongthe windlass during the winding operation is governed by the position ofthe windlass frame on the surbase. Thus, if the windlass frame be swungin one direction or the other on its pivot, one end or the other, ofsaid windlass frame will ride higher on the inclined surbace, and thecorresponding end of the windlass shaft will. be lifted out ofhorizontal and the lead of the cable will be influenced accordingly. Thecable may thus be made to lead properly without respect to which end ofwindlass it is desired to lead toward from said partition flange.

The mast may oscillate in its socket without materially twisting theguys or hoisting cable, and by paying out one side guy line andtightening the other the mast may be tilted sidewise, slightly, so as togive the boom a tendency to swing by gravity over the repository to beloaded.

The ratchet wheels on the drive shaft and their pawls and operatinglever form a kicking device, which is adapted to rapidly rotate thewindlass to take up slack when shifting the cable from one end of thewindlass to the other, or it may be used to hold the windlass whileunder load to relieve the horses or the brake operator.

Having now described my invention What I claim is 1. In a derrick, thecombination of a base, a forwardly inclined surbase, a mast, a boom, aforwardly inclined windlass frame mounted on said surbase and pivotedthereto, and adapted at its opposite ends to ride up or down theinclined plane formed by said surbase, means for rotating said Windlassand a hoisting cable secured at one end to said windlass and supportedintermediate of its ends by said boom.

2. In a derrick, the combination of a base, a forwardly inclined surbasemounted thereon and secured thereto, a windlass frame mounted on saidsurbase and pivotally connected thereto and adapted to swing up or downthe inclined plane formed by said surbase, means for rotating saidwindlass, a mast mounted on said frame, a boom mounted on said mast, ahoisting cable secured at one end to said Windlass and supportedintermediate of its ends by said mast.

3. In a derrick, the combination of a base, a surbase mounted on saidbase and having a forwardly inclined upper face, a Windlass framemounted on said surbase and having a forwardly inclined lower facecorresponding to the inclined face of said surbase and pivotallyconnected to said surbase and adapted at one end to swing up or down theinclined plane formed by said surbase, a windlass mounted on said frameand comprising a drum of greater diameter at one end than at the other,the enlarged end of said drum being partitioned from the reduced endthereof by an annular flange, a hoisting cable secured at one end tosaid fiange,'a mast mounted on said base, a boom mounted on said mast,said hoisting cable being supported intermediate of its ends by saidboom, means for shifting the inter 5 mediate portion of said cable fromthe en larged end of said Windlass to the reduced end thereof, means forrotating said Windlass, said means including a drive wheel, an idlersheave and an endless drive belt engaging said drive wheel and idlersheave, means for securing a means of power to said drive beltintermediate of said drive wheel and said idler sheave, and means forbraking said Windlass.

a. In a derrick, the combination of a base, a socket mounted thereon, aclevis seated in said socket and adapted to swing horizontally a limiteddistance, a mast hinged in said clevis and adapted to swing vertically,adjustable means for supporting said mast at an incline or in a verticalposition as de sired, a boom mounted on said mast, a wind lass in rearof said mast, a hoisting cable secured at one end to said Windlass andsup ported intermediate of its ends by said boom, and means foroperating said windlass.

5. In a derrick, the combination of a suitable support, a rotatableshaft mounted thereon, a Windlass drum keyed to said shaft, twooppositely toothed ratchet wheels keyed to said shaft, a pawl positionedat one side of one of said ratchet wheels and adapted in operation toengage the same, a pawl positioned at the opposite side of the otherratchet wheel and adapted in operation to engage the same a rock barpivotally connected to said pawls intermediate of their ends, means foroperating said rock bar to throw one or the other of said pawls intoengagement with its ratchet wheel as desired.

In testimony whereof I hereunto aflix my signature, in presence of twowitnesses.

ALBERT FOREST.

Witnesses JAMES T. Lawson, C. T. CRANDALL.

